Buy 2019 Subaru STI Switch Seat Heater (Left, Rear). Seat Heater Switch If your heated seats don't Consider, Don - OEM Subaru Part # 83245AL250

Seat Heater Switch.

SWITCH-REAR SEAT HEATER LEFT Seat Heater Switch

Fits Outback

Seat Heater Switch
If your heated seats don't work, consider having a technician who specializes in repairing your 2019 Subaru STI examine the seat heater switch.